Mary C. Lamia said this quote

Volatile expressions of anger and hostility combined with a tendency to blame others often result from feeling shame.... If you are shame-prone, any accusation directed at you, regardless of how mildly it may be delivered, has the potential to make you feel that you have failed or that you are inadequate. Rather than simply admit wrongdoing, you get angry and accusatory in order to hold yourself blameless. Using anger or hostility for self-protection hides your vulnerability and needs. Unfortunately, since most people are repelled by an angry response, this method may be effective. Your anger may drive away the very people who should know your real feelings, and it may deprive you of the opportunity to allow others to be aware of your needs. Behaving in an offensive or frightening way toward others can cause them to retreat out of fear. But, actually, the fear is your own, which you have turned against someone else in the form of anger.

~ Mary C. Lamia

If you have realistic ideals and can generally live up to them, your self-esteem will not be threatened. If your ideals are exaggerated and you cannot reach them, your good feelings from successes may be short lived, and you may feel that you are never good enough.The continued hope for the impossible, the expectation that you will or can be unconditionally loved and adored, is not facing reality but rather holding onto an idealized image of yourself and an idealized version of what others can provide. If this is the case, your sense of self may be threatened by shame and its resulting depression, or by feelings of inadequacy for not living up to your unrealistic ideals. A better understanding of shame may help you recognize your tendency to hide what you feel from yourself and others.

~ Mary C. Lamia